Binding-post.



1%. 774,469. PATENTED Nov. 8, 1904.

'H. J. GUTTMAN, BINDING POST.

APPLICATION FILED MAY; 1903 RENEWED OUT. 3, 1904.

no MODEL.

WITNESSES: INVENTQR:

I 0. 757 MM I UNITED STATES Patented November 8, 1904.

PATENT OEEicE.

HARRY J. GUTTMAN, OF CHICAGO, ILLINOIS, ASSIGNOR TO STROVVGER AUTOMATIC TELEPHONE EXCHANGE, A CORPORATION OF ILLINOIS.

BINDING-POST.

SPECIFICATION formingpart of Letters Patent No. 774,469, dated- V ml 8, 1904.

7 Application filed May 4. 1903. Renewed October 3, 1904. Serial No. 227,021. (No model.)

To all whom, it may concern.-

Be it known that I, HARRY, J. GUTTMAN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented anew and useful Binding- Post, of which the following is a specification.

My invention relates to binding-posts or any similar means adapted to removably hold circuit-terminals in electrical apparatus, and comprises a simple device which is specially formed so as to be not only eflicient for the purpose intended, but may be made at a low cost in comparison to other means commonly used for a similar purpose, the same being hereinafter described, and illustrated in the accompanying drawings, in which Figure 1 is an isometric perspective view of a device in which is embodied my improvement. Fig. 2 is a front elevation of a blank which is adapted to be bent into the form shown in Fig. 1. Fig. 3 is a plan of the blank shown in Fig. 2. Fig. 4 is a plan of the device, showing two sizes of wire clamped therein in cross-section. Fig. 5 is a side elevation of the device and showing manner of attaching to an object, which latter is shown in vertical section. Figs. 6 and? are modiiications to illustrate regular bends in the sides of the main body portion instead of the rightangle bends shown in Fig. 4. Fig. 7 also shows how a screw may be disposed through the lapped front portion of the device and screw into the back portion thereof and yet close the interspace between the lapped portions.

Similar letters and numerals indicate like parts throughout the several views.

Referring to the blank, Fig. 2, the main body and essential part of the device is the portion above broken line A, which is provided with a screw-threaded hole 1 at one end and an elongated hole 2 at the opposite end. At 3 is a transverse groove, and at the opposite end portion on the opposite face from groove 3 is another groove, 4. In this instance the main body is first bent to a right angle inwardly near the broken lines B B and C C at one end portion and then at D D and E E at the opposite end portion, so that the extreme end portions 5 and 6 lap, as seen in Figs. 1 and 4, and being resilient and normally standing at a slight distance apart form an interspace, which latter is closed by means of the screw 7, disposed through the hole 2 and in engagement with the screw-threaded hole 1, as seen in Fig. 4. When the blank is bent to the form shown in Figs. 1 and 4, the grooves 3 and 4 register, and thus form a broad bearing for clamping the end of a large wire 8. A very small wire 9 may also be held by inserting it in the clamp at the opposite side of screw 7 from wire 8. At 10 in this instance is a downwardly-projecting portion having a hole 11 for screw 12, which secures the device in position, and at 13 is a rearward projection or spur which is bent back out of the plane of the clamp to engage .with the support and prevent turning on the screw, asillustrated in Fig. 5. An additional projection 14 is to facilitate the permanent attachment of a wire terminal. Itis obvious that the end portions 5 and 6 extend in opposite directions and may be brought around to lap and assume many different forms; but in practice the forms shown in the plans 4, 6, and 7 are easily attained in the die and forming press.

In the modifications shown in Figs. 6 and .7 each end portion is bent in a semicircle instead of twice, as in Fig. 4, and the screw 15 is of a length in Fig. 7 to pass entirely through the lapped portions and enter the back of the device when it is obvious that the front lapped portion 5 will be drawn inwardly and serve to clamp a wire sufficiently firm for the purpose intended.

This binding post may be entirely and quickly formed of Wrought metal and for this reason may be produced at a very low cost, and since it presents a comparatively large surface in contact with the wire terminal it not only offers low resistance to the electric current, but is specially adapted to holding small wires Without danger of injuriously crushing them.

I claim as my invention- 1. A binding-post for securing the terminals of electric circuits consisting of a metallic strip having the end portions thereof bent inwardly past each other with an interspace between the lapped portions, and a screw disposed therein and adapted to close the interspace, for the purpose stated.

2. A binding-post for electric terminals consisting of a flexible strip of material, the ends of which extend in opposite directions and overlap each other and normally stand at a distance apart, and separate means for positively forcing the ends toward each other to lessen said distance.

3. A binding-post for electric terminals consisting of a flexible strip of material, the ends of which extend in opposite directions and are perforated and overlap each other until said perforations register and normally stand at a distance apart, and a screw through the perforations for forcing the ends toward each other.

4. A binding-post for electric terminals consisting of a flexible strip of material, the ends of which extend in opposite directions and are perforated and overlap until the perforations register, one of the perforations being oblong and the other one screw-threaded the ends normally standing at a distance apart, and a screw through said perforations.

5. A binding-post for electric terminals consisting of a flexible strip of material, the ends of which are perforated and grooved transversely, said ends being overlapped until said perforations and grooves register with each other respectively and normally stand at a distance apart, and a screw for forcing said ends toward each other.

6. A bin ding-post for electric terminals consisting of a strip of flexible material, the ends of which extend in opposite directions and overlap and normally stand at a distance apart, one edge of the strip being provided with means for connecting an electric terminal thereto, and separate means for positively forcing said ends toward each other to lessen said distance.

7 A binding-post for electric terminals consisting of a strip of flexible material, the ends of which are perforated and overlap until said perforations register, and normally stand at a distance apart, one edge of the strip being provided with a projection which forms a means of attaching a terminal thereto and is perforated, and the other edge being provided with a retaining-spur, and a screw through the perforations of the overlapping portions.

8. A blank for forming a binding-post comprising a strip of flexible material, the ends of which are perforated and grooved transverse] y, said grooves being upon opposite sides of the strip and one of them being between one of the perforations and the intermediate portion of the strip and the other one being between the other perforation and the end of the strip.

In testimony whereof I have signed my name to this specification in the presence of two witnesses.

HARRY J. GUTTMAN.

Witnesses SAMUEL COLE, OscAR SNELL. 

